Woof is a script; that can download packages of some other GNU/Linux distribution, cut them right down to Puppy-size, then build a Puppy Linux live-CD/DVD - and do all of this totally automatically. The design of Woof is intended to be so flexible that packages from any distro can be processed. At the time of writing Woof is supporting Debian, Ubuntu, Slackware and Arch. Puppy can be built from whatever is the current one. Whenever there is a new release, all that Woof needs is the name of the release and Woof will then download all the packages and build a new Puppy Linux. It may take a couple of hours fixing some package names, but the idea is that in one day one has a brand new release of Puppy. The end result is Puppy Linux! That is one ends up with something that has the speed, compactness and all the ease-of-use features of Puppy Linux, with nothing sacrificed. Even building from Ubuntu packages, one gets a 99MB (or thereabouts) live-CD, a fast Puppy that runs in RAM, all of the Puppy applications and all of the tools and familiar desktop. Note that Woof currently only builds on a Puppy host system.